The Priority List Arizona Follows
This is the statute that answers one of the most common questions in healthcare planning: "What happens if I do not have a health care power of attorney and I cannot speak for myself?" Arizona does not leave the answer to chance. The law sets a specific order of priority for who can make medical decisions on your behalf.
If the patient has a health care power of attorney that meets the requirements of section 36-3221, the patient's designated agent shall act as the patient's surrogate. However, if the court appoints a guardian for the express purpose of making health care treatment decisions, that guardian shall act as the patient's surrogate.
A.R.S. § 36-3231(A)When neither a healthcare agent nor a court-appointed guardian exists, the law turns to family in this order: (1) your spouse (unless legally separated), (2) your adult children (a majority of those reasonably available must agree), (3) a parent, (4) your domestic partner (if unmarried), (5) a sibling, and (6) a close friend who is familiar with your healthcare wishes and willing to act in your best interest.
When No Surrogate Can Be Found
If none of the people on the list can be located, your attending physician may make healthcare decisions after consulting with an institutional ethics committee. If that is not possible, the physician may proceed after consulting with a second physician who agrees with the proposed course of treatment.
This fallback exists because medical decisions sometimes cannot wait. But it also illustrates exactly why having a health care power of attorney matters. Without one, a committee of strangers may end up directing your care. Naming an agent yourself takes that uncertainty off the table.
Mental Health Care Has Additional Protections
Arizona draws a careful line around mental health treatment. A surrogate who is not your designated agent or guardian generally cannot authorize admission to a psychiatric facility. The exception is narrow: if a mental health professional determines you are incapable and likely to suffer serious physical harm without immediate hospitalization, a surrogate can consent to emergency admission. But a petition for court-ordered evaluation or temporary guardianship must be filed within forty-eight hours, or you must be discharged.
